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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1-2 days






2. 147 days






3. Parturition is controlled by...






4. 1-2 days






5. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






6. 30 hours after estrus begins






7. 14-19 (17) days






8. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






9. Provide nourishment for the developing sperm






10. Animals which have only one estrous cycle (ex: dog - fox)






11. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






12. (male) pushes the testes upward toward the body for warmth or protection






13. Depository for semen during insemination. where urine leaves the body






14. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






15. 336 days






16. 2 month growth cycle. stored in the epididymis of the bull






17. What makes the milk flow through the mammary glands?






18. 45-60 days after breeding; re-breed as required






19. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






20. What helps regulate spermatogenesis?






21. Failure to have both testis (gonads) descend






22. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






23. 114 days






24. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






25. (male) pushes the testes upward toward the body for warmth or protection






26. Front feet and head first. (except for hogs and dogs)






27. Allows extension of penis without fibro-elastic penis






28. 19-23 (21) days






29. Parturition is controlled by...






30. Microscopic - make sure not sterile - very few bulls are actually tested






31. Check feet and legs - look for masculine traits in build such as crest and muscling






32. Animals which have many estrous periods per year (ex: cow - sow)






33. Why does estrus happen before ovulation?






34. Animals which have only one estrous cycle (ex: dog - fox)






35. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






36. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






37. ~60 days before calving






38. Produce testosterone. located between the seminiferous tubules






39. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






40. (LH) causes female's egg to break (her period)






41. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






42. To remove/separate testicles from animal's body before animal reaches puberty






43. 24 hours before end of estrus cycle






44. 14-19 (17) days






45. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






46. 114 days






47. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






48. 265-285 days






49. Milk ~305 days - dry 60 days prior to calving






50. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.